Mixminion: A Type III Anonymous Remailer

Mixminion is the reference implementation of the Type III Anonymous
Remailer protocol.

Note:Mixminion is not under active development,
and probably will not work if you try to use it. I'd love for somebody
to resurrect mixnet remailer R&D, and have some thoughts on the topic which
I'd be more than happy to share. Mixminion might serve as a good basis for
such an effort. But for practical use, it is not currently recommended.
It may not build on your system of choice; if it builds, it may not work.
It is not currently supported. Probably only developers, researchers,
and anonymity enthusiasts should be trying it out. Good luck! —Nick Mathewson, August 2013.

Documentation

The Design Document gives our justifications
and security analysis for the Mixminion design:

The second release candidate for Mixminion 0.0.7 is now available. There
numerous bugfixes and improvements over the previous release candidate.
If no significant bugs are found, I'll release 0.0.7final very soon.
You can download the code
or read the release notes.
{Signature}

The first release candidate for Mixminion 0.0.7 is now available. There
are significant changes to the network layer, numerous bugfixes, and
several new features, including configurable bandwidth caps, client-side
large-message reassembly, and configurable server blocking.
You can download the code
or read the release notes.
{Signature}

Note: Due to a bug in this release candidate, it doesn't
work with Python versions earlier than Python 2.2. If you are running 2.0
or 2.1, you should either try the code in CVS, or wait for 0.0.6rc2.

October 30, 2003 20:50 EST

The bugfixed version 0.0.5.3 is now available. Everyone running a server
sound upgrade: there is a showstopper in 0.0.5.2 that prevents it from
relaying messages to older servers. For more information on changes,
check out the release notes.
You can download the code
or read the release notes.
{Signature}

October 27, 2003 08:27 EST

The bugfixed version 0.0.5.2 is now available. If you are running
a server, you will probably want to upgrade: this release should be
a major stability improvement. For more information on changes,
check out the release notes.
You can download the code
or read the release notes.
{Signature}

Mixminion 0.0.4rc4 is available for testing!
In this release are numerous critical bugfixes and cosmetic improvements
identified over the last week of testing.
There are no more pending
items for the 0.0.4 release. Unless somebody finds a showstopper bug by
Thursday, I'll just update the version number and call this release 0.0.4.
As ever, you can download the code
or read the release notes.
{Signature}

June 6, 2003 04:48 EST

Mixminion 0.0.4rc3 is available for testing!
In this release are numerous critical bugfixes and cosmetic improvements
identified over the last week of testing.
There are no more pending
items for the 0.0.4 release. Unless somebody finds a showstopper bug by
Monday, I'll just update the version number and call this release 0.0.4.
As ever, you can download the code
or read the release notes.
{Signature}

May 30, 2003 03:37 EST

Mixminion 0.0.4rc2 is available for testing!
Thanks to three hours experience of testing Mixminion 0.0.4rc1, we
finally tracked down a critical bug that's been crashing people's servers
since 0.0.3. It's better now.
You can download the code
or read the release notes.
{Signature}

May 30, 2003 00:04 EST

Mixminion 0.0.4rc1 is avaialable for testing! Directories are more
automated, servers are more stable, key rotation is in, keys are longer,
MMTP is better, key generation is automatic, server statistics are
started, and the code is generally cleaner.
This release breaks backward compatibility; everyone should upgrade
and look for bugs before the real release is out.
You can download the code
or read the release notes.
{Signature}

The first release candidate for Mixminion 0.0.3 is available.
Reply blocks and client side pooling are implemented.
This release breaks backward compatibility; everyone should upgrade
and look for bugs before the real release is out.
You can download the code
or read the release notes.
{Signature}